/*
- * Copyright (c) 2016 Cisco and/or its affiliates.
+ * Copyright (c) 2016-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
static void
tcp_pg_edit_function (pg_main_t * pg,
pg_stream_t * s,
- pg_edit_group_t * g,
- u32 * packets,
- u32 n_packets)
+ pg_edit_group_t * g, u32 * packets, u32 n_packets)
{
- vlib_main_t * vm = vlib_get_main();
+ vlib_main_t *vm = vlib_get_main ();
u32 ip_offset, tcp_offset;
tcp_offset = g->start_byte_offset;
- ip_offset = (g-1)->start_byte_offset;
+ ip_offset = (g - 1)->start_byte_offset;
while (n_packets >= 1)
{
- vlib_buffer_t * p0;
- ip4_header_t * ip0;
- tcp_header_t * tcp0;
+ vlib_buffer_t *p0;
+ ip4_header_t *ip0;
+ tcp_header_t *tcp0;
ip_csum_t sum0;
u32 tcp_len0;
ASSERT (p0->current_data == 0);
ip0 = (void *) (p0->data + ip_offset);
tcp0 = (void *) (p0->data + tcp_offset);
- tcp_len0 = clib_net_to_host_u16 (ip0->length) - sizeof (ip0[0]);
+ /* if IP length has been specified, then calculate the length based on buffer */
+ if (ip0->length == 0)
+ tcp_len0 = vlib_buffer_length_in_chain (vm, p0) - tcp_offset;
+ else
+ tcp_len0 = clib_net_to_host_u16 (ip0->length) - tcp_offset;
/* Initialize checksum with header. */
if (BITS (sum0) == 32)
{
sum0 = clib_mem_unaligned (&ip0->src_address, u32);
- sum0 = ip_csum_with_carry (sum0, clib_mem_unaligned (&ip0->dst_address, u32));
+ sum0 =
+ ip_csum_with_carry (sum0,
+ clib_mem_unaligned (&ip0->dst_address, u32));
}
else
sum0 = clib_mem_unaligned (&ip0->src_address, u64);
/* Invalidate possibly old checksum. */
tcp0->checksum = 0;
- sum0 = ip_incremental_checksum_buffer (vm, p0, tcp_offset, tcp_len0, sum0);
+ sum0 =
+ ip_incremental_checksum_buffer (vm, p0, tcp_offset, tcp_len0, sum0);
- tcp0->checksum = ~ ip_csum_fold (sum0);
+ tcp0->checksum = ~ip_csum_fold (sum0);
}
}
-typedef struct {
+typedef struct
+{
pg_edit_t src, dst;
pg_edit_t seq_number, ack_number;
pg_edit_t data_offset_and_reserved;
#define _(f) pg_edit_t f##_flag;
- foreach_tcp_flag
+ foreach_tcp_flag
#undef _
- pg_edit_t window;
+ pg_edit_t window;
pg_edit_t checksum;
pg_edit_t urgent_pointer;
} pg_tcp_header_t;
{
/* Initialize fields that are not bit fields in the IP header. */
#define _(f) pg_edit_init (&p->f, tcp_header_t, f);
- _ (src);
- _ (dst);
- _ (seq_number);
- _ (ack_number);
- _ (window);
- _ (checksum);
- _ (urgent_pointer);
+ _(src);
+ _(dst);
+ _(seq_number);
+ _(ack_number);
+ _(window);
+ _(checksum);
+ _(urgent_pointer);
#undef _
/* Initialize bit fields. */
foreach_tcp_flag
#undef _
-
- pg_edit_init_bitfield (&p->data_offset_and_reserved, tcp_header_t,
- data_offset_and_reserved,
- 4, 4);
+ pg_edit_init_bitfield (&p->data_offset_and_reserved, tcp_header_t,
+ data_offset_and_reserved, 4, 4);
}
uword
unformat_pg_tcp_header (unformat_input_t * input, va_list * args)
{
- pg_stream_t * s = va_arg (*args, pg_stream_t *);
- pg_tcp_header_t * p;
+ pg_stream_t *s = va_arg (*args, pg_stream_t *);
+ pg_tcp_header_t *p;
u32 group_index;
-
+
p = pg_create_edit_group (s, sizeof (p[0]), sizeof (tcp_header_t),
&group_index);
pg_tcp_header_init (p);
pg_edit_set_fixed (&p->seq_number, 0);
pg_edit_set_fixed (&p->ack_number, 0);
- pg_edit_set_fixed (&p->data_offset_and_reserved,
- sizeof (tcp_header_t) / sizeof (u32));
+ pg_edit_set_fixed (&p->data_offset_and_reserved,
+ sizeof (tcp_header_t) / sizeof (u32));
pg_edit_set_fixed (&p->window, 4096);
pg_edit_set_fixed (&p->urgent_pointer, 0);
#define _(f) pg_edit_set_fixed (&p->f##_flag, 0);
foreach_tcp_flag
#undef _
+ p->checksum.type = PG_EDIT_UNSPECIFIED;
- p->checksum.type = PG_EDIT_UNSPECIFIED;
-
- if (! unformat (input, "TCP: %U -> %U",
- unformat_pg_edit,
- unformat_tcp_udp_port, &p->src,
- unformat_pg_edit,
- unformat_tcp_udp_port, &p->dst))
+ if (!unformat (input, "TCP: %U -> %U",
+ unformat_pg_edit,
+ unformat_tcp_udp_port, &p->src,
+ unformat_pg_edit, unformat_tcp_udp_port, &p->dst))
goto error;
/* Parse options. */
while (1)
{
if (unformat (input, "window %U",
- unformat_pg_edit,
- unformat_pg_number, &p->window))
+ unformat_pg_edit, unformat_pg_number, &p->window))
;
else if (unformat (input, "checksum %U",
- unformat_pg_edit,
- unformat_pg_number, &p->checksum))
+ unformat_pg_edit, unformat_pg_number, &p->checksum))
;
+ else if (unformat (input, "seqnum %U", unformat_pg_edit,
+ unformat_pg_number, &p->seq_number))
+ ;
+ else if (unformat (input, "acknum %U", unformat_pg_edit,
+ unformat_pg_number, &p->ack_number))
+ ;
/* Flags. */
#define _(f) else if (unformat (input, #f)) pg_edit_set_fixed (&p->f##_flag, 1);
- foreach_tcp_flag
+ foreach_tcp_flag
#undef _
-
- /* Can't parse input: try next protocol level. */
- else
+ /* Can't parse input: try next protocol level. */
+ else
break;
}
{
- ip_main_t * im = &ip_main;
+ ip_main_t *im = &ip_main;
u16 dst_port;
- tcp_udp_port_info_t * pi;
+ tcp_udp_port_info_t *pi;
pi = 0;
if (p->dst.type == PG_EDIT_FIXED)
&& unformat_user (input, pi->unformat_pg_edit, s))
;
- else if (! unformat_user (input, unformat_pg_payload, s))
+ else if (!unformat_user (input, unformat_pg_payload, s))
goto error;
if (p->checksum.type == PG_EDIT_UNSPECIFIED)
{
- pg_edit_group_t * g = pg_stream_get_group (s, group_index);
+ pg_edit_group_t *g = pg_stream_get_group (s, group_index);
g->edit_function = tcp_pg_edit_function;
g->edit_function_opaque = 0;
}
return 1;
}
- error:
+error:
/* Free up any edits we may have added. */
pg_free_edit_group (s);
return 0;
}
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff